4.6 Article

Effect of supercritical CO2 extraction on pore characteristics of coal and its mechanism

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Geosciences, Multidisciplinary

Impact of Microbially Enhanced Coalbed Methane on the Pore Structure of Coal

Di Gao et al.

Summary: In this study, the pore structure characteristics of No. 3 coal seams in Qinshui Basin after microbial treatment were analyzed. It was found that microorganisms participated in the degradation of coal reservoirs and promoted the production of methane gas. The modification of meso-macropores was more significant, resulting in stabilized pore diameter, smoother pores, decreased specific surface area, and increased pore volume, which are beneficial for the adsorption and production of coalbed methane (CBM) after microbial treatment.

FRONTIERS IN EARTH SCIENCE (2022)

Article Chemistry, Multidisciplinary

Effect of Freeze-Thaw Cycles on Coal Pore Structure and Gas Emission Characteristics

Junwei Yuan et al.

Summary: In this study, we aim to investigate the influence of freeze-thaw cycle on the pore structure and gas emission characteristics of coal body, and to improve the application level of antipermeability and pumping technology based on freezing-induced cracking in a low-permeability coal seam. Freeze-thaw cycles were conducted on anthracite and coking coal, and the transformation characteristics of pore structure and gas emission characteristics were analyzed. The results reveal changes in the pore structure of coal samples after freeze-thaw cycle, as well as an increase in gas emission characteristics. The research provides a theoretical basis for the production of low-permeability coal seam.

ACS OMEGA (2022)

Article Energy & Fuels

Porosity of gas shale: Is the NMR-based measurement reliable?

Peng Zhao et al.

Summary: This study compares the results of nuclear magnetic resonance (NMR) measurements on shale samples with different water soaking times, revealing a correlation between NMR porosity and soaking time, which raises doubts about the objectivity of NMR-based porosity in reflecting the actual shale porosity. Supplementary methods were used to verify the changes in the pore system of shale samples induced by water soaking. The study concludes that NMR-based porosity of shale is not reliable enough when water is used as the probe and suggests ways to enhance its reliability.

PETROLEUM SCIENCE (2022)

Article Energy & Fuels

Effect of supercritical-CO2 interaction time on the alterations in coal pore structure

K. H. S. M. Sampath et al.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2020)

Article Chemistry, Multidisciplinary

Pore Structure of Coals by Mercury Intrusion, N2 Adsorption and NMR: A Comparative Study

Qingzhong Zhu et al.

APPLIED SCIENCES-BASEL (2019)

Article Chemistry, Multidisciplinary

Changes in Pore Structure of Coal Associated with Sc-CO2 Extraction during CO2-ECBM

Run Chen et al.

APPLIED SCIENCES-BASEL (2017)